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  <title>Closure Performance Tests - Vector math</title>
  <link rel="stylesheet" type="text/css"
        href="../testing/performancetable.css"/>
  <script src="../base.js"></script>
  <script>
    goog.require('goog.crypt');
    goog.require('goog.string');
    goog.require('goog.testing.PerformanceTable');
    goog.require('goog.testing.jsunit');
    goog.require('goog.vec.Vec4');
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<body>
  <h1>Closure Performance Tests - Vector Math</h1>
  <p>
    <strong>User-agent:</strong>
    <script>document.write(navigator.userAgent);</script>
  </p>
  <div id="perfTable"></div>
  <hr>

  <script>
    var table = new goog.testing.PerformanceTable(
        goog.dom.getElement('perfTable'));
    var createVec4FromValues = goog.vec.Vec4.createFromValues;
    var scaleVec4 = goog.vec.Vec4.scale;

    var negateVec4ByScaling = function(v, result) {
      return scaleVec4(v, -1, result);
    };

    var negateVec4ByNegation = function(v, result) {
      result[0] = -v[0];
      result[1] = -v[1];
      result[2] = -v[2];
      result[3] = -v[3];
      return result;
    };

    var negateVec4ByMultiplication = function(v, result) {
      result[0] = -1 * v[0];
      result[1] = -1 * v[1];
      result[2] = -1 * v[2];
      result[3] = -1 * v[3];
      return result;
    };

    function createRandomVec4() {
      return createVec4FromValues(
          Math.random(),
          Math.random(),
          Math.random(),
          Math.random());
    }

    function testNegateVec4ByScaling() {
      var v = createRandomVec4();
      for (var i = 0; i < 2000000; i++) {
        // Warm the trace tree to see if that makes a difference.
        scaleVec4(v, 1, v);
      }

      table.run(
          function() {
            for (var i = 0; i < 2000000; i++) {
              negateVec4ByScaling(v, v);
            }
          },
          'Negate vector by calling scale()');
    }

    function testNegateVec4ByNegation() {
      var v = createRandomVec4();
      for (var i = 0; i < 2000000; i++) {
        // Warm the trace tree to see if that makes a difference.
        scaleVec4(v, 1, v);
      }

      table.run(
          function() {
            for (var i = 0; i < 2000000; i++) {
              negateVec4ByNegation(v, v);
            }
          },
          'Negate vector by negating directly');
    }
  </script>
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